通信理论变换OFDM信号的分布以降低峰均功率比

Xiaodong Zhu, Guangxi Zhu, Pei Lin
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引用次数: 15

摘要

大的峰均功率比(PAPR)是正交频分复用(OFDM)系统的主要缺点。本文提出了一种新的非线性方案来降低PAPR。该方案将原始OFDM信号的幅值由瑞利分布转换为beta分布。此外,给定不同的参数,该格式具有不同的变换表达式。结果表明,已知的基于指数函数和误差函数的扩展方案实际上是本文方案的特例。进一步,我们推导了该方案的另一种更简单的表达式。仿真结果表明,与指数函数和误差函数扩展方案相比,该方法能更好地平衡PAPR降低和误码率(BER)性能。版权所有©2010 John Wiley & Sons, Ltd
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Communication Theory Transforming the distribution of OFDM signals for peak-to-average power ratio reduction
Large peak-to-average power ratio (PAPR) is the main drawback of orthogonal frequency division multiplexing (OFDM) systems. In this paper, a novel nonlinear scheme is proposed to reduce the PAPR. This scheme transforms the amplitude of original OFDM signals from Rayleigh distribution into beta distribution. Moreover, given different parameters, this scheme has different transformation expressions. It is demonstrated that the well-known companding schemes based on exponential function and error function are actually the special cases of the proposed scheme. Further, we derive another simpler expression of the proposed scheme. Simulation results show that the new transformation can achieve a better tradeoff between PAPR reduction and bit-error rate (BER) performance than the exponential function and error function companding schemes. Copyright © 2010 John Wiley & Sons, Ltd.
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